#include <STC15F2K60S2.H>
#include <intrins.H>

sbit TX=P1^0;
sbit RX=P1^1;

void Delay12us()		//@12.000MHz
{
	unsigned char i;

	_nop_();
	_nop_();
	i = 33;
	while (--i);
}

void Uart_Init()
{
	TX=1;
	Delay12us();
	TX=0;
	Delay12us();
}

unsigned char Uart_Wave()
{
	unsigned int Temp;
	TMOD&=0x0f;
	TH1=TL1=0;
	Uart_Init();
	TR1=1;
	while((RX==1) && (TF1==0));
	TR1=0;
	if(TF1==0)
	{
		Temp=(TH1<<8)|TL1;
		return Temp*0.017;
	}
	else
	{
		TF1=0;
		return 0;
	}
}